Question choice by variable

Hello to this Forum, my name is Mario and I come from German and this is my first written topic and Im not English native, therefore apologize if something isn't correct.

Please let me try to explain my challenge;

We have a package of 20 standard questions and additional 3packages of region(US / Asia / European) questions (10Q per region) and I need to create one LMS-quiz with 3 different content-types depending the regions of the learner.

Therefore my first idea was to created different question banks (Standard-bank / US-bank / Asia-bank / European-bank).

Then I created a start page where you can select your region, based on this selection I created a 3variable (true/false) named like regionUS.

This means when you select in example US the variable regionUS changed value from false to true.

Then I placed the standard-bank and at the final quiz slide runs an evaluation which of the 3variables is true and in this example it jumped to the US bank.

Now I want to create a result slide for our LMS to show me 100% when I answered all 30questions correct but here I struggled.

I cant select during creation the correct bank dependent the variable therefore is there any way to handle this in a better way, maybe all questions in one big package but I dont know how you can set up a condition like show me this question under the condition that the variable regionUS is true and so on.

Any ideas are welcome.

Many Thanks

Mario